CN2438890Y

CN2438890Y - Aseptic diaphragm valve

Info

Publication number: CN2438890Y
Application number: CN 00223987
Authority: CN
Inventors: 邱家山; 黄晓军
Original assignee: YINGDE INDUSTRY Co Ltd CHENGDU
Current assignee: YINGDE INDUSTRY Co Ltd CHENGDU
Priority date: 2000-08-18
Filing date: 2000-08-18
Publication date: 2001-07-11
Anticipated expiration: 2010-08-18

Abstract

The utility model relates to an aseptic diaphragm valve which belongs to a low pressure diaphragm valve. The utility model comprises a valve body, a valve cap, valve cores which are mutually fixed and connected together, the diaphragm which is embeded with a fixing nail, a valve rod, and a screw type elevating mechanism for elevating the valve rod, wherein, the valve body is welded and composed of a cone-shaped body valve seat in an inner cavity, and two elbow connecting tubes. The utility model has the structural characteristics that the inner cavity of the valve body has no dead angle, the utility model is easy to grind and polish, a high fineness requirement is achieved, and the aseptic diaphragm valve can be quickly disassembled, assembled, cleaned, and sterilized conveniently. The aseptic diaphragm valve is mainly suitable for pharmacy and foodstuff industries.

Description

Aseptic membrane valve

The utility model relates to valve, makes the field especially for the low pressure diaphragm valve of industries such as pharmacy.

According to " valve design handbook (China Machine Press, Yang Yuanquan chief editor), existing membrane valve commonly used is divided into weir formula, direct current type, straight-through type and pin type membrane valve.For the valve that is used for pharmacy and food service industry, satisfying (needle type valve seldom occasion uses) under the prerequisite of negotiability, clean and aseptic requirement are arranged all, this just requires body cavity not have the dead angle of alluvial medium and has high finishingness; In addition, also should have the structural feature that is easy to the easy accessibility cleaning and sterilizing.And the valve body structure complexity of existing weir formula, direct current type, straight way diaphragm valve only is suitable for precision casting, is unsuitable for turning processing, cavity polishing difficulty, thereby manufacture cost height; And above-mentioned membrane valve all can not satisfy the requirement of quick detach fast-assembling.

Task of the present utility model is to provide a kind of aseptic membrane valve at above the deficiencies in the prior art part, reaches the high finishingness requirement to reach body cavity by common turning polishing processing.

Task of the present utility model is realized that by following design a kind of aseptic membrane valve comprises valve body, valve gap, connects firmly together spool and the diaphragm and the valve rod that are embedded in fixing nail mutually, is used for the screw elevator structure of lifting valve rod; Described valve body is welded by valve seat and two elbow's of the tapered body of inner chamber.

From above-mentioned design as seen, valve body is welded by valve seat and two elbow's of the tapered body of inner chamber, thereby the manufacturing of valve body only needs the common process mode, as turning processing and welding processing, the valve support chamber body structure is simplified, do not have the dead angle, easily polishing meets the requirements of degree of finish. can satisfy pharmacy, food service industry clean and aseptic requirement to valve.

Below in conjunction with accompanying drawing the utility model is described in detail:

Fig. 1 is a sectional drawing of the present utility model;

Fig. 2 Fig. 3 is respectively the plan view (sectional drawing) and the plan view of valve seat shown in Figure 1.

Fig. 1 illustrates in conjunction with Fig. 2 Fig. 3, valve body is welded by valve seat 1 and two 45 ℃ of elbow's 2,2a, two elbow' outer ends are welded with the fast-assembling chuck, valve base cavity is a taper, have semicircular notch 1a on its end face, embed sealing for the seal ring 3a on the diaphragm 3, gland 4 is crimped on the valve gap 9 (the corresponding half garden shape notch that has on the valve gap end face embeds sealing for the diaphragm seal ring) and passes through scyewed joint with the valve seat outer side surface.Above-mentioned valve connecting end is that fast-assembling chuck structure and valve seat, valve gap adopt gland scyewed joint (existing weir diaphragm valve should be bolt mutually and connects), satisfies seal request fully on the one hand, has the quick detach fast-assembling on the other hand, makes things convenient for the characteristics of cleaning and sterilizing.Diaphragm 3 materials are selected for use according to flowing medium, pre-buried fixing nail 5 on it, and the diaphragm profile is similar to the valve seat cavity, is equipped with a seal ring 3a on it.Pin rod 6 interts in the hole of on spool 7 and diaphragm 3 pre-buried fixing nail 5 and valve rod 8, and the three is combined as a whole.The valve gap inwall offers and makes pin rod along its two guiding groove 9a, 9b that move up and down, and it can not rotate spool and diaphragm in the open and close process of valve, can only move up and down, and makes diaphragm not bear twisting action power, can improve the working life of diaphragm.The top of valve rod is set with band look plastic sheath 16, to indicate the aperture of valve.The screw elevator structure that is used for the lifting valve rod is: handwheel 12 and spiral cover 11 welding, and rotation direction nut 15 connects by Cock screw 10 (adopting 2) with the spiral cover 11 that is enclosed within its outer side surface, and the rotation direction nut sleeve connects with threaded stem on valve rod.Also be respectively arranged with pad 13,14 between valve gap and the spiral cover and between the fitting surface between valve gap and the rotation direction nut, loss reduces friction.

Compare with existing diaphragm valve, the utlity model has following design feature and advantage: (1) valve is capable Journey short (with respect to through type), flow resistance little (with respect to the weir formula) is lower (with respect to directly to the flexible requirement of barrier film General formula), sealing, cuttability and trafficability performance are all good; (2) do not need hot investment casting, only need cut processing, Body cavity does not have the dead angle, and is easy to the requirement that sanding and polishing reaches best bright finish; (3) has the quick detach fast-assembling Design feature. Therefore, it satisfies pharmacy, food service industry to the requirement of high quality valves.

Claims

1, a kind of aseptic membrane valve comprises valve body, it is characterized in that, also comprises valve gap (9), connects firmly spool (7) together mutually and is embedded with the diaphragm (3) and the valve rod (8) of fixing nail, is used for the screw elevator structure of lifting valve rod; Described valve body is welded by valve seat (1) and two elbow's of the tapered body of inner chamber.

According to the described aseptic membrane valve of claim 1, it is characterized in that 2, described elbow is two 45 ° of shaping elbows (2,2a).

3, aseptic membrane valve according to claim 2 is characterized in that, described 45 ° of shaping elbows (2,2a) outer end all is welded with the fast-assembling chuck; Also comprise be crimped on valve gap (9) go up, with the gland (4) of valve seat (1) outer side surface by scyewed joint.

4, aseptic membrane valve according to claim 3 is characterized in that, is equipped with a seal ring (3a) on the described diaphragm (3); Described valve seat (1) and valve gap (9) adjoin each other and offer semicircular notch as embedding seal ring (3a) on the face.

5, aseptic membrane valve according to claim 4 is characterized in that, also comprises pin rod (6), and pin rod (6) interts in the hole of the fixing nail (5) of diaphragm (3) and valve rod (8) and spool (7), and the three is connected into one; Described valve gap (9) inwall offers and makes pin rod (6) along its two guiding grooves (9a, 9b) that move up and down.

6, according to arbitrary described aseptic membrane valve in the claim 1 to 5, it is characterized in that, described screw elevator structure is constructed as follows: hand is swung (12) and is connected firmly mutually with spiral cover (11), is enclosed within the rotation direction nut (15) that valve rod (8) is gone up and the valve rod spiral connects and connects by Cock screw (10) with the spiral cover that is enclosed within its outer side surface (11).

7, aseptic membrane valve according to claim 6 is characterized in that, also is respectively arranged with pad (13,14) between described valve gap (9) and the spiral cover (11) and between valve gap (9) and the rotation direction nut (15).

8, aseptic membrane valve according to claim 7 is characterized in that, described valve rod (8) top is set with band look plastic sheath (16).